Matrix Orbital VK204-25 Legacy - Manual (Page 8)

Table 2: Connectors & Functions
Connector Function
14 pin dual header General purpose outputs (6)
4 pin Power (5.0 VDC) and I 2 C commu-
nications
10 pin header Keypad
DB-9F RS-232 / Power
2.1.1 Power and I 2 C Connections
Power is applied via pins 1 and 4. Power requirement is +5 VDC ±0.25V. Power may also be supplied
via the RS-232 connector as described in the next section.
WARNINGS
• Do not apply any power with reversed polarization.
• Do not apply any voltage other than the specified voltage.
• Do not use any cables other than the cables supplied by Matrix
Orbital, unless aware of the modifications required.
• Do not apply voltage to the DB-9 connector AND power connector
• Do not apply more than +5Vdc to pin #9 on the DB-9 connector
Connector pinout is as follows;
Figure 3: Power Connector
Table 3: Connector Pinout
Pin 4 Ground
Pin 3 SDA (I 2 C data)
Pin 2 SCL (I 2 C clock)
Pin 1 +5.0 VDC (+7 to +15 VDC with wide voltage option)
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